The Edwards 5540M Millennium Central Tone Generator has been designed for applications where simultaneous signaling of a high decibel, heavy duty signal is required. The tone generator assures a synchronous signaling sound from all remote speakers. The Millennium Central Tone Generator produces the 55 standard Adaptatone® sounds. Four tones may be activated from field wired, normally open contacts or a 24 VDC or 120 VAC external voltage source such as an output of a PLC. Normally open contacts can be obtained from the catalog no. 5538-4 or catalog no. 5538-4R Adaptatone® Signal Actuator. The tones are selected by setting miniature dip switches within the unit. The programmed tones operate on a pyramid type priority system. For more information on priority tone operation and a complete listing of all 55 tones, refer to the catalog pages listed to the left. On-site volume control is accomplished by adjusting the conveniently located volume control inside the unit. The 5540M-485Y6 is designed to be connected to RS485 networks, allowing full serial signaling communication control. Adaptatone® Signaling Systems are designed for industrial applications calling for high decibel output and microprocessor reliability combined with simultaneous signal delivery over all speakers included in the system. Typical applications include: emergency warning systems, plant evacuation alarms, security intrusion sirens, process monitoring, shift start-and-dismissal horns and paging signals.